如图,在
中,
,
,
,点
为
的中点,
于点
,点
从
点出发沿折线
运动(含
、
两点),当动点
在
上运动时,速度为每秒
个单位,当动点
在
上运动时,速度变为每秒
个单位,到达点
停止运动,设点
的运动时间为
秒,线段
的长度记为![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
关于
的函数表达式,并注明自变量
的取值范围;
(2)若函数
,在给定的平面直角坐标系中分别画出函数
和
的图象,并写出该函数
的一条性质;
(3)结合函数图象,请直接估计
时
的取值范围.(保留一位小数,误差不超过
)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addb8e20db1fbb40f17dea52f951b907.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/45acdbac251ca6b76a166c1242e71df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3ededa0e19291b5b7eb9884af5bdeb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dba8836c829cecb00be48b102ed9bbd8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d59ab85c075a09d55d69e159e4abb268.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d97dc3b752832906de41447bb58a341.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6503ca085e3ca5f2ba723b0dd66e210b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892909e49156f7dcc0650fcd65243877.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(2)若函数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ae6090cdf1769d924572bc7301d52585.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46f6872ffb1934339c53c2c2282d5889.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54015ff5b49e3283901da1291b6b921d.png)
(3)结合函数图象,请直接估计
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ac67e9a909472ab852d38d2ec66a1e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4646418552dc060ebda1232361a01295.png)
2024·重庆·一模 查看更多[2]
2024学年重庆市第八中学校九年级下学期第一次模拟(学月)考试数学模拟试题(已下线)中考重点05 动态几何+函数图像(6题型+满分技巧+限时检测)-2024年中考数学【热点·重点·难点】专练(重庆专用)
更新时间:2024-03-25 20:02:31
|
相似题推荐
解答题-作图题
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【推荐1】甲、乙两人周末从同一地点出发去某景点,因乙临时有事,甲坐地铁先出发(h),甲、乙两人行驶的路程分别为y1(km)与y2(km).如图①是y1与y2关于x的函数图象.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/6/4a25f3a7-6eba-406d-be42-492a03ecf8cb.png?resizew=554)
(1)分别求线段OA与线段BC所表示的y1与y2关于x的函数表达式;
(2)当x为多少时,两人相距6km?
(3)设两人相距S千米,在图②所给的直角坐标系中画出S关于x的函数图象.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/6/4a25f3a7-6eba-406d-be42-492a03ecf8cb.png?resizew=554)
(1)分别求线段OA与线段BC所表示的y1与y2关于x的函数表达式;
(2)当x为多少时,两人相距6km?
(3)设两人相距S千米,在图②所给的直角坐标系中画出S关于x的函数图象.
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名校
【推荐2】有这样一个问题:探究函数
的图象与性质,小童根据学习函数的经验,对函数的图象与性质进行研究,已知当
时,
;当
时,
.下面是小童探究的过程,请补充完整:
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/14/275b0f8c-a6c9-40b6-9a2f-9e42056b6d44.png?resizew=391)
(1)该函数的解析式为______,
______,
______.
根据图中描出的点,画出函数图象.
(2)根据函数图象,下列关于函数性质的描述正确的是______;
①该函数图象是中心对称图形,它的对称中心是原点.
②该函数既无最大值也无最小值.
③在自变量的取值范围内,
随
的增大而减小.
(3)请结合(1)中函数图象,直接写出关于
的不等式
的解集.(保留1位小数)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/df1521265e0f99e1cf7541e7980c8758.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/707ea658f3a9359f5740d5aab48f7948.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/806c0ee9c41c0accc711dd325aefa26f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bb45f673c56a289ea78831c9237e8d20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/92002afa0b414eae387a91207c629398.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/6/14/275b0f8c-a6c9-40b6-9a2f-9e42056b6d44.png?resizew=391)
(1)该函数的解析式为______,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f3cb8d72bb2e281b943b3b430138ef7.png)
根据图中描出的点,画出函数图象.
![]() | … | -4 | -3 | -2 | 0 | 2 | 3 | 4 | … |
![]() | … | ![]() | 1.5 | 1 | -3 | 9 | ![]() | 5 | … |
①该函数图象是中心对称图形,它的对称中心是原点.
②该函数既无最大值也无最小值.
③在自变量的取值范围内,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
(3)请结合(1)中函数图象,直接写出关于
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c1bb467e79a41764e9406d9e5d7925.png)
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解答题-作图题
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【推荐3】如图,P是矩形ABCD内部的一定点,M是AB边上一动点,连接MP并延长与矩形ABCD的一边交于点N,连接AN.已知AB=6cm,设A,M两点间的距离为xcm,M,N两点间的距离为y1cm,A,N两点间的距离为y2cm.小欣根据学习函数的经验,分别对函数y1,y2随自变量x的变化而变化的规律进行了探究.下面是小欣的探究过程,请补充完整;
(1)按照如表中自变量x的值进行取点、画图、测量,分别得到了y1,y2与x的几组对应值;
(2)在同一平面直角坐标系xOy中,描出以补全后的表中各组对应值所对应的点(x,y1),并画出函数y1的图象;
(3)结合函数图象,解决问题:当△AMN为等腰三角形时,AM的长度约为 cm.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/6/df61a3e9-9ba4-4eb9-b5b1-b97d4a580ca4.png?resizew=146)
(1)按照如表中自变量x的值进行取点、画图、测量,分别得到了y1,y2与x的几组对应值;
x/cm | 0 | 1 | 2 | 3 | 4 | 5 | 6 |
y1/cm | 6.30 | 5.40 | 4.22 | 3.13 | 3.25 | 4.52 | |
y2/cm | 6.30 | 6.34 | 6.43 | 6.69 | 5.75 | 4.81 | 3.98 |
(3)结合函数图象,解决问题:当△AMN为等腰三角形时,AM的长度约为 cm.
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解答题-问答题
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【推荐1】如图,已知点
的坐标为
,以
为边构造菱形
,使点
恰好落在
轴上,连接
交
轴于点
,
交
轴于点
.
(1)求直线
的解析式;
(2)点
为
的中点,点
为线段
上一动点,
周长最小时,
①求点
的坐标;
②求出
周长的最小值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03710f659865b0332985f8a5af6d4d49.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4113c492885ba7c47fe42ac792578f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/30/e7440968-2801-4b5c-95bf-dbc3ad42a303.png?resizew=184)
(1)求直线
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
(2)点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acc290b44635265137fdf13146b6a6d9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7a551505ae42b49904bab59b17012d8.png)
①求点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
②求出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c7a551505ae42b49904bab59b17012d8.png)
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解答题-应用题
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【推荐2】2022年3月25日,教育部印发《义务教育课程方案和课程标准(2022年版)》,优化了课程设置,将劳动从综合实践活动课程中独立出来,为弘扬和传承中华民族的传统文化,强化劳动教育成果,锦江区某中学在端午节前夕,面向全体学生开展了包粽子比赛活动.已知A小组同学包的粽子个数y(个)与所用时间x(分)的关系如图2所示.
(2)若B小组同学每分钟能包6个粽子,什么时候A小组同学包的粽子个数会超过B小组?
(2)若B小组同学每分钟能包6个粽子,什么时候A小组同学包的粽子个数会超过B小组?
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解答题-作图题
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适中
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【推荐1】如图,
是直角三角形,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/1fd9858b-ba3d-4573-9786-65f3d8248ffc.png?resizew=151)
(1)动手操作:利用尺规作
的平分线,交
于点O,再以O为圆心,
的长为半径作
(保留作图痕迹,不写作法);
(2)综合运用:请根据所作的图,若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/1/1fd9858b-ba3d-4573-9786-65f3d8248ffc.png?resizew=151)
(1)动手操作:利用尺规作
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d39b8d91afc34e4a9b0fdbb6bafb9087.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
(2)综合运用:请根据所作的图,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd45c01b13214f715223baa6a137422f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
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解答题-证明题
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【推荐2】如图,
中,
,
,
、
分别为
、
上一点,
,
、
分别为
、
的中点.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3262fc038bbec5e7c8cc47df08bef7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d89ba4036a5d18ec4abed44d7fd8e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b1bd1adfe4cc6566218f19970c2fd3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac679f877d3e3b3acef1f1f8e3654b4b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6aa2b5e09f8ec785c59900a529390a02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/410b283dedec5577c3988d3b19b1d031.png)
![](https://img.xkw.com/dksih/QBM/2019/6/24/2232484071219200/2232512617783296/STEM/0f7de517f4ce463f864d55def7a536c7.png?resizew=195)
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